Bottom -> top and left -> right is just two statements put together, because they are the same one, just with different directions, so basically in Level 5 you have to have it count up by 1 when reading from top to bottom, but you also have to go up by 1 when reading from left to right, it is a similar mechanic to the one in level 2 Read this, if you want the solution for that level, otherwise don't: Build a sort of staircase from bottom left to top right (starting with 0 on bottom left and ending it with 3 on top right), after that add a PERU to the right of the 3, but below it